CN102071589A - Multi-roll calendar and method for converting a multi-roll calendar - Google Patents
Multi-roll calendar and method for converting a multi-roll calendar Download PDFInfo
- Publication number
- CN102071589A CN102071589A CN2010105581629A CN201010558162A CN102071589A CN 102071589 A CN102071589 A CN 102071589A CN 2010105581629 A CN2010105581629 A CN 2010105581629A CN 201010558162 A CN201010558162 A CN 201010558162A CN 102071589 A CN102071589 A CN 102071589A
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- China
- Prior art keywords
- roller
- roll
- hard
- surface layer
- paper
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Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G1/00—Calenders; Smoothing apparatus
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G1/00—Calenders; Smoothing apparatus
- D21G1/02—Rolls; Their bearings
- D21G1/0233—Soft rolls
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21G—CALENDERS; ACCESSORIES FOR PAPER-MAKING MACHINES
- D21G1/00—Calenders; Smoothing apparatus
- D21G1/02—Rolls; Their bearings
- D21G1/0253—Heating or cooling the rolls; Regulating the temperature
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- Paper (AREA)
Abstract
The multiroll calendar comprises a roll stack, in which two consecutive rolls form a roller nip for calendaring wood free coated paper on a brightness according to Gardner of greater than 75% or natural gravure papers on a pps-10 S-roughness under 1.15 mu m or film-coated light-weight coated papers on a brightness according to Gardner over 55%. An independent claim is included for a method for converting multi-roll calendars. In order that fewer rollers than usual are used for calendaring high-quality paper on a brightness, the roll stack is structured in a following row sequence such as a hard controlled deflection top roller, an elastic center roller with a thin metallic surface layer, a heatable hard middle roller, and two elastic middle rollers with a thin metallic surface layer, a heatable hard middle roller, an elastic middle roller with a thin metallic surface layer and a hard controlled deflection bottom roller.
Description
Technical field
The present invention relates to a kind of glazing calender that has closed assembly roller group, wherein, per two up and down in succession roller form a roll gap, coated paper (WFC) the glaze polishing that is used for not conforming to ground wood pulp manage to Gardner (Gardner) fineness greater than 75%, perhaps supercalendered paper (SCA) glaze polishing is managed to roughness (PPSS 10) less than 1.15 μ m, perhaps light weight coated paper (LWC) the glaze polishing of plated film is managed to Gardner's fineness greater than 55%.
The invention still further relates to a kind of method of reequiping glazing calender, this glazing calender has a closed assembly roller group, in this closed assembly roller group, except changing the gap, the roller that has hard, smooth and a heatable surface and the roller that has elastic surface are alternately, per two adjacent roller form the working clearance that can handle paper web, and top roll and lower roll are the controlled rollers of amount of deflection.
Background technology
The closed assembly roller group of current glazing calender has 5 to 14 rollers, the closed assembly plane that they are determined by the roller horizontal axis vertical usually or as common for the applicant angle at 45 layout.This calender online, be not arranged on the production sequence of paper machine under the situation of just reeling in the middle of have, perhaps off-line ground is arranged, at the paper machine sideband own coiling and expanding unit is arranged.Roll gap (also claiming roller gap) is the roller contact-making surface that paper web is handled on acting in conjunction ground, and described roll gap is in this smooth, hard and heatable roller and a resilient roller by one respectively, normally relevant with condensate roller formation.The what is called that unique exception is made up of two resilient roller is changed the gap.
Hard roller is interpreted as a kind of like this roller, and it is 50 to 200mm thick and very firm that its outer steel shell or hard cast iron shell are about, and be equipped with smooth metal or ceramic surface simultaneously.Surface roughness is below Ra value 0.1 μ m.Roller is heatable, and heating realizes by means of the heat transport fluid that flows through roller usually.Resilient roller can take on a different character.Perhaps be provided with the shell that is made of metal, this shell has the elastic surface jacket of for example being made by polymer, rubber or cotton, and perhaps the shell of whole rotation is formed by the elastic plastic material that is form of composite.
Even described roll gap has guaranteed also to compress paper web equably owing to the elasticity of resilient roller under higher pressure and temperature when the glaze polishing is managed, but this all is the prerequisite of good printing characteristic in all printing processes commonly used.
Yet the smooth effect of roll gap is unifaciality basically, that is to say, advances the paper side that obviously contacts greater than that can not heat with another, relevant with polymer roller with the bright and clean peace rectification of paper side hard, smooth and heatable roller contact.The dual character of the smooth effect of elasticity roll gap is big more, and pressure and temperature is just selected highly more, that is to say need be higher glaze polishing reason power.Just in time be very high in above-mentioned sheet type.
In 1989, just considered also to make resilient roller to heat at DE 3937246A1, so that improve the efficient of calender by the filling or the cladding material of heat conduction.According to this invention, resilient roller can be heated to 200 to 300 ℃.But this found it is irrealizable the manufacturing of this roller after 20 years, so this is a conspicuous reason of always not using its described glaze polishing reason method and roller why up to now.Also to consider so-called supercalender at this, wherein, elasticity of substitution roller is installed described roller, if at this moment want to keep in the middle of closed assembly roller group it to change the gap, 12 rollers just must be arranged, because can't set the elasticity clad for deflection controlled top roll or lower roll till now.Thus, begin just have two faced and want that changing the gap by skew compensates this dual character if treat the paper of glaze polishing reason, closed assembly roller group can only reduce to 10 rollers.
On the contrary, the modern glazing calender that is used for very high paper quality is equipped with 10 rollers usually, wherein, change the gap just in time be arranged on the centre of closed assembly roller group and roller folded in topmost and nethermost roller have polymer coating and be configured to deflection compensating roll.Can that is to say that by this device each paper side contacts four times with hard, roller smooth and that heated with two paper side of each four roll gap glaze polishings reason.Be positioned at the folded middle symmetrical layout that realized of roller by changing the gap, and therefore also realized glaze polishing reason effect symmetry, much at one for two paper side.
At this, shortcoming especially is the smooth effect of each roll gap unifaciality more or less, and this makes needs a large amount of calender rollers, and this makes calender not only expensive, and makes the nothing wearing and tearing of this machine move the difficulty that becomes.The roller that is coated with polymer has high wearing and tearing, is easy to occur so-called " streak " (because the wearing and tearing of pulsed produce wavy surface) and therefore often replacing.This has obviously reduced the gross efficiency of paper machine when online the installation.Under the situation that off-line is installed, also obviously reduced the availability of calender.
When roller number big (for example 10), calender is easy to vibration under various working conditions, therefore must change the manufacturing parameter (speed, pressure etc.) of wishing.
In also being configured to the so-called flattening mechanism of four rollers, only use hard, metallic roll.Yet the hard roll gap that this wherein two paper side are flattened in the same manner can not be used for the glaze polishing reason of above-mentioned quality.
Summary of the invention
Technical problem to be solved by this invention is, can be enough manage high-quality sheet type than current required roller number roller glaze polishing still less, especially Gardner's fineness greater than the coated paper (WFC) of 75% wood-free or roughness (PPS S 10) less than the supercalendered paper (SCA) of 1.15 μ m or Gardner's fineness light weight coated paper (LWC) greater than 55% plated film.For described quality, present standard for example is to use at least 10 rollers or use 2 * 5 rollers when speed surpasses 1400m/min in a roller is folded in two rollers are folded for breadth.
This technical problem solves by this way, promptly, select completely specified roller arrangements, closed assembly roller group just is installed in the following order: the controlled hard top roll of deflection, the elasticity intermediate calender rolls that has thin matallic surface layer, heatable hard intermediate calender rolls, two have the elasticity intermediate calender rolls of thin matallic surface layer, heatable hard intermediate calender rolls, have the elasticity intermediate calender rolls and the controlled lower roll of deflection of thin matallic surface layer.
Fully beat allly be identical fineness value and flatness value in the time of in high-quality paper, to realize 10 roll calendar machines with controlled top roll of its deflection of use and lower roll rubber-like clad by this 8 roll calendar machines.Although each paper side of paper web only contacts with hard warm-up mill for twice, this calender structure obviously is enough to realize this positive structure.Also beat all is to find that in experiment when use had the resilient roller of matallic surface layer, the closed assembly roller group of other number was compared the traditional calender that has two rollers with layout and no longer caused the improvement high like this to paper quality.The reason of this specific character does not also obtain explaining.In any case, have in use under the resilient roller situation of matallic surface layer, for example the roller quantity of old-fashioned supercalender is reduced to 10 from 12 and no longer cause similar glaze polishing reason effect.By 8 roll calendar machines of the present invention correspondingly is a kind of selection invention, owing to do not obtain as yet explaining that its advantage is only correct for this roller device.People guess is only relevant with the novel surface that uses, and this novel surface is because injection method (Spritzverfahren) and be anchored in the flexible substrate well and therefore can bear load in section greater than 300N/mm, and not broken.Obviously moderate surface temperature and high surface finish attainable at present, that be lower than Ra=0.1 μ m have been realized thus.Yet it is to be noted why this specific character of resilient roller is to bring higher paper quality to be still waiting research under the situation of other roller quantity.
Therefore, the replacing gap in the middle of the calender is kept, and has also avoided the various dual characters of paper web.At this, the heating of resilient roller can be limited in the suitable temperature control.In general, described calender need be than traditional 10 roll calendar machines heat energy still less.
Be considered to advantageously, at least one resilient roller that has matallic surface layer has 90 to 130 ℃ surface temperature when the operation of glaze polishing reason.This preferably all resilient roller that have a matallic surface layer all be heated by this way.In pressing 8 roll calendar machines of the present invention, each paper side contacts once with the hard roller of a heat and contacts twice with the resilient roller of a moderate heating.In this manner, the heat delivery of saving two warm-up mills can not be discovered the influence of glaze polishing reason effect.
If at least one roll gap, act on the load in section of 300N/mm at least, be used for roll gap length is remained on 10mm at least along the breadth traffic direction, then be favourable.Therefore, even if arrive under the high speed of 2000m/min 1400 at breadth, the holdup time in the roll gap is also even as big as being fed in the paper web enough hot-fluids.Roll gap length is defined as such length, and one on this length in paper web and two rollers contacts.
For heat transmission situation (for example causing) not enough owing to different water capacities to paper web, advantageously, one clamping element is set, and this clamping element makes paper web abut in at least 5 ° envelope angle before or after the roll gap on the roller that has smooth, hard and the surface of being heated at least.Produce thus and preheat distance or supplementary heating distance about roll gap.At least be directed to heat transmission to a certain extent and prolonged roll gap.
It must be significant for the calender network operator that 10 roll calendar machines are tapered to 8 rollers.Illustrate as follows:
-changed system frequency (this system frequency can cause the streak phenomenon before in case of necessity)
-use not have the top roll elasticity clad, that deflection is controlled or lower roll (being these roller installation or removal clads, being very frequent and expending man-hour that spare roll wherein to be used is very expensive) with the polishing clad
-can reduce to be used for the heater of heatable hard roller
-do not have the roller of polymer surfaces, thus the danger that the counter roller by heat damages clad got rid of, therefore can omit cutting edge device (this device has brought extra breadth width, thereby band requires extra output).
About being used to reequip the method for glazing calender, technical problem of the present invention solves in this wise: when top roll and lower roll have hard when surperficial, for top roll and lower roll set the shell that has the elasticity clad, perhaps when top roll and lower roll rubber-like clad, for top roll and lower roll set the shell that has hard smooth surface, in addition, for at least one roller that has an elasticity clad sets the sprayed coating of metal, also second roller and penult roller are removed from closed assembly roller group in addition.By respectively top roll and lower roll being changed into other roller-type, on the contrary just hard become soft or, the replacing gap of glazing calender remains on the existing position, thereby needn't consider because the loss that the dual character of paper web causes.By this simple change, top roll is matched with the 3rd roller of original calender, and lower roll is matched (all being several from top to bottom) with third from the bottom roller of original calender, this means, second and the penult roller can from roller is folded, shift out.Now, the effect of the hard warm-up mill that lacks substitutes as follows: resilient roller has obtained metal coating, and therefore the same smooth with hard warm-up mill, just has the Ra value that is lower than 0.1 μ m equally.
Preferred this method of using is used for roller quantity is reduced to 8 rollers from 10.Described in the glazing calender, proved already as that 10 roll calendar machines before especially comparing had the effect of identical glaze polishing reason ability in 8 new roll calendar machines.
Advantageously, heat the metal coating of at least one resilient roller.At this, the resilient roller moderate moisture improve just be enough to obtain aspect the quality of paper with before have the identical effect of calender of 10 rollers.
Preferably the metal coating with at least one resilient roller is heated to 90 to 130 ℃.This temperature is suitable for producing the paper quality of hope ideally.At this, use other hard warm-up mill obviously to save energy relatively.Because the external heat for example by induction can just be carried the as many heat that reduces with paper web to metal coating.This and traditional warm-up mill differently produce hardly because the heat loss that convection current causes.
Advantageously, paper web is abutted on the roller that has smooth, hard, the surface of being heated in the stretch journey before or after the roll gap.Supply heat energy and glaze optical processing better extraly to breadth in this way.
Description of drawings
Followingly describe the present invention in detail according to embodiment with reference to accompanying drawing.Schematic diagram by glazing calender of the present invention has been shown in unique accompanying drawing.
The specific embodiment
Glazing calender 1 has eight rollers: the hard top roll 2 that deflection is controlled, the elasticity intermediate calender rolls 3 that has thin matallic surface layer, heatable hard intermediate calender rolls 4, two have thin matallic surface layer 5,6 elasticity intermediate calender rolls, heatable hard intermediate calender rolls 7 has the elasticity intermediate calender rolls 8 and the controlled hard lower roll 9 of deflection of thin matallic surface layer.Directly the paper web 11 from the paper machine 12 that schematically illustrates by rectangle is coated papers (WFC) high-quality, wood-free, its should be in described glazing calender the glaze polishing manage to Gardner's fineness greater than 75%.But, paper web also can be a supercalendered paper (SCA), its should be in glazing calender 1 the glaze polishing manage to roughness (PPS S 10) be the light weight coated paper (LWC) of plated film less than 1.15 μ m or described paper web, its should by the glaze polishing manage to Gardner's fineness greater than 55%.
New resilient roller 3,5,6,8th has the roller of the elastic layer that the epoxides (Epoyid) strengthened by fiber makes, and is the same in traditional resilient roller, only on elastic layer spraying from mobile metal level.Show Ni17Cr 4Fe 4Si 3.5B 1C and (WC 12Co) 33Ni 9Cr 3.5Fe 2Si2B 0.5C in experiment, just comprise nickel, the sprayed on material of chromium and iron is the material that is particularly suitable for superficial layer.
In glazing calender, paper web more than 11 time turns to by guide roller 10, thereby makes breadth can be guided through roll gap or roller gap, just the contact area between two adjacent roller 2-8.Paper web is reeled in coiler device 13 in glazing calender 1 back.
Have matallic surface layer 3,5,6,8 resilient roller is in the glaze polishing reason surface temperature with 90 to 130 ℃ in service.In form of implementation shown in Figure 1, this heating realizes by the outside induction heating apparatus 15 that is gone out by box indicating.
Top roll and lower roll 2,9 have the smooth surface that is made of metal.Described top roll and lower roll can heat by the external heat device equally.Roller also advantageously has the surface roughness of Ra value less than 0.1 μ m.
Closed assembly roller group loads in mode known and that therefore do not illustrate like this at least one end,, produces the load in section of 300N/mm at least one roller gap that is.This causes roll gap length to surpass 10mm and cause for to the enough big contact-making surface of the heat transmission of paper web 11 along the breadth traffic direction usually.For situation not enough between heat transfer regions, a clamping element will be set, this clamping element makes paper web abut on the warm-up mill 4,7 with the envelope angle greater than at least 5 ° before roll gap or afterwards.Carry enough heats to glaze polishing reason process in this way.In this embodiment, clamping element is configured to the shape of hold-down roller simply.But also can advantageously consider, use, should be used on long distance, producing contact pressure so that transmit heat to hard warm-up mill 4 better against band against band.
List of numerals
1 glazing calender
The hard top roll that 2 deflections are controlled
3,5,6,8 have the elasticity intermediate calender rolls of thin matallic surface layer
4,7 heatable hard intermediate calender rolls
The hard lower roll that 9 deflections are controlled
10 guide rollers
11 paper webs
12 paper machines
13 coiler devices
14 clamping elements
The induction heating apparatus of 15 outsides
Claims (9)
1. glazing calender that has closed assembly roller group, wherein, per two in succession rollers (2 and 3 up and down, 3 and 4,4 and 5,5 and 6,6 and 7,7 and 8,8 and 9) form a roll gap, be used for coated paper (WFC) the glaze polishing of wood-free manage to Gardner's fineness greater than 75%, perhaps supercalendered paper (SCA) glaze polishing is managed to roughness (PPS S 10) less than 1.15 μ m, perhaps light weight coated paper (LWC) the glaze polishing of plated film is managed to Gardner's fineness greater than 55%, it is characterized in that, described closed assembly roller group is constructed in the following order: the hard top roll (2) that deflection is controlled has the elasticity intermediate calender rolls (3) of thin matallic surface layer, heatable hard intermediate calender rolls (4), two elasticity intermediate calender rolls (5 that have thin matallic surface layer, 6), heatable hard intermediate calender rolls (7) has the elasticity intermediate calender rolls (8) and the controlled lower roll (9) of deflection of thin matallic surface layer.
2. glazing calender as claimed in claim 1 is characterized in that, at least one has the resilient roller of metallic surface layer (3,5,6,8) in the glaze polishing reason surface temperature with 90 to 130 ℃ in service.
3. glazing calender as claimed in claim 1 or 2 is characterized in that, causes the load in section of 300N/mm at least at least one roll gap, so that obtain along the breadth traffic direction roll gap length of 10mm at least.
4. as the described glazing calender of one of claim 1 to 3, it is characterized in that, one clamping element (14) is set, and this clamping element makes described paper web (11) at least on the surface that abuts in smooth, hard and the roller that heated before or after the roll gap with at least 5 ° envelope angle.
5. a method that is used to reequip the glazing calender that has closed assembly roller group wherein except changing gap (between 5 and 6), has hard, the roller (4 on smooth and heatable surface, 7) with the roller (3,5,6 of elastic surface, 8) alternate, and per two adjacent roller (2 and 3,3 and 4,4 and 5,5 and 6,6 and 7,7 and 8,8 and 9) form the working clearance that to handle described paper web (11), and wherein, described top roll and lower roll (2,9) are the controlled rollers of amount of deflection, it is characterized in that, when described top roll and lower roll have hard when surperficial, for described top roll and lower roll (2,9) set the shell that has the elasticity clad, perhaps when described top roll and lower roll (2,9) during the rubber-like clad, for described top roll and lower roll (2,9) set the shell that has hard smooth surface, in addition, for at least one has the roller (3,5,6 of elasticity clad, 8) set the sprayed coating of metal, and also second roller and penult roller are removed from closed assembly roller group in addition.
6. method as claimed in claim 5 is characterized in that, roller quantity reduces to 8 from 10.
7. as claim 6 or 7 described methods, it is characterized in that, heat the metal coating of at least one resilient roller.
8. method as claimed in claim 7 is characterized in that, the metal coating of at least one resilient roller is heated to 90 to 130 ℃.
9. as the described method of one of claim 5 to 9, it is characterized in that, by in a bit of distance of clamping element (14) before or after roller gap paper web being abutted on the roller (4) that has smooth, hard and the surface of being heated.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102009046918.4 | 2009-11-20 | ||
| DE200910046918 DE102009046918A1 (en) | 2009-11-20 | 2009-11-20 | Multi-roll calender and conversion process of a multi-roll calender |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102071589A true CN102071589A (en) | 2011-05-25 |
Family
ID=43067037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105581629A Pending CN102071589A (en) | 2009-11-20 | 2010-11-19 | Multi-roll calendar and method for converting a multi-roll calendar |
Country Status (3)
| Country | Link |
|---|---|
| EP (2) | EP2385172B1 (en) |
| CN (1) | CN102071589A (en) |
| DE (1) | DE102009046918A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116856137A (en) * | 2023-09-04 | 2023-10-10 | 莱州联友金浩新型材料有限公司 | Hot rolling optical equipment and hot rolling process for porous fiber film material |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010028175A1 (en) * | 2010-04-26 | 2011-10-27 | Voith Patent Gmbh | Method for increasing the quality of a paper machine |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3937246C2 (en) | 1988-11-11 | 2002-06-27 | Metso Paper Inc | calendering |
| DE19508352B4 (en) | 1995-03-09 | 2005-07-21 | Voith Paper Patent Gmbh | Calender for the treatment of a paper web |
| DE19813640A1 (en) * | 1998-03-27 | 1999-09-30 | Voith Sulzer Papiertech Patent | Calender, especially for the treatment of a paper web |
| DE102004003715B3 (en) | 2004-01-24 | 2005-08-18 | Voith Paper Patent Gmbh | Method for operating a multi-roll calender and calender |
-
2009
- 2009-11-20 DE DE200910046918 patent/DE102009046918A1/en not_active Withdrawn
-
2010
- 2010-09-16 EP EP11175279A patent/EP2385172B1/en not_active Not-in-force
- 2010-09-16 EP EP20100177009 patent/EP2325387B1/en not_active Not-in-force
- 2010-11-19 CN CN2010105581629A patent/CN102071589A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116856137A (en) * | 2023-09-04 | 2023-10-10 | 莱州联友金浩新型材料有限公司 | Hot rolling optical equipment and hot rolling process for porous fiber film material |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2325387B1 (en) | 2012-09-05 |
| EP2325387A3 (en) | 2011-06-01 |
| EP2325387A2 (en) | 2011-05-25 |
| DE102009046918A1 (en) | 2011-05-26 |
| EP2385172B1 (en) | 2012-09-05 |
| EP2385172A1 (en) | 2011-11-09 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110525 |